/**
 * This class is for exceptions thrown by the vending machine class.
 * Examples of such exceptions include giving a price that is < 0, trying to
 * add an item that is already in a certain spot, etc.
 * @author wong
 *
 */
public class VendingMachineException extends RuntimeException {
        // Leave the line below in your code. You won't need to know what it is for
        // this course.
        private static final long serialVersionUID = 1L;
        
        
        /**
         * Default constructor
         */
        public VendingMachineException() {
        
        }

        /**
         * Constructor with an error message
         * @param reason The error message for the exception
         */
        public VendingMachineException(String reason) {
                super(reason);
        }
}